Senior Software Engineer, Full Stack

Payabli is a next-generation Payments Infrastructure and Monetization Platform purpose-built for vertical software companies. Through a single, developer-friendly API with low-code embedded payment components, Payabli enables platforms to seamlessly embed, monetize, and operationalize payments—making payments a core part of their platform and business model. By unifying payment acceptance, payment issuance, and advanced payment operations tooling, Payabli empowers software companies to manage and move money through a single infrastructure stack that delivers total control over the payments experience. Built to scale with PCI DSS 4.0 and SOC 2-compliant security, Payabli’s infrastructure delivers enterprise-grade reliability and trust while leveraging AI-driven intelligence to enhance visibility, streamline operations, and drive revenue growth. Backed by leading fintech investors including QED Investors, Fika Ventures, TTV Capital, and Bling Capital, Payabli is setting the standard for embedded payments infrastructure powering the next generation of vertical SaaS. As a Senior Software Engineer, Full-Stack at Payabli, you’ll own the interfaces that sit between complex financial infrastructure and the humans who use it every day – merchant dashboards, onboarding flow, embeddable components, and white-label experiences consumed by our platform partners and their end users. You’ll work at the intersection of product, design, and backend engineering to ship a UI that is fast, bulletproof, and genuinely pleasant to use. Trust and precision are paramount in the products we build so balancing great Human Interface Design (HID) principles with robust, secure engineering isn’t a nice-to-have, it is the job. What You'll Do - Build the product people touch. Design, develop, and maintain the frontend applications and reusable component libraries that power Payabli’s, and its partners, platforms. - Ship embeddable experiences. Build hosted payment forms, white-label components, and drop-in UI that third-party platforms integrated directly with their own products. Your code needs to be lean, flexible and rock-solid as it will be running inside other people’s software. - Bridge frontend and backend. Collaborate closely with other service owning teams to integrate via APIs and real-time data streams, ensuring seamless data flow across the stack & overall platform - Raise the bar. Lead code reviews, champion frontend standards, and drive architectural decisions that keep the codebase healthy as we scale. - Multiply the team. Mentor engineers around you and elevate frontend engineering quality across the organization through pairing, documentation and leading by example. - Own the full lifecycle. Work across requirements, implementation, testing, and deployment. We don’t throw things over the wall here. - Sweat the details. Optimize for performance, accessibility, and cross-browser compatibility. What We're Looking For We’re looking for someone who meets the minimum requirements below. If you meet them, we encourage you to apply – your skills and trajectory matter more than checking every box. - 5+ years of professional frontend engineering experience. You've shipped real products to real users. - React, Typescript and C# You don’t just use React, you understand its rendering model, know when to reach for which patterns, and can reason about performance at the component level. - Strong understanding of CSS and responsive design. You can build pixel-perfect, accessible interfaces without leaning on a framework for everything. - API integration experience. You’ve shipped products that rely upon APIs from multiple services and know to gracefully handle loading states, errors, and edge cases. - State management chops. Experience with Redux, Zustand, or similar frameworks. You have strong opinions on what is the right tool when. - Strong communicator. You enjoy walking your partners (design, PM, other engineers, leadership) through technical trade-off